Jason Felds
74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/* RageSoundReader_Resample_Good - fast audio resampling. */
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#ifndef RAGE_SOUND_READER_RESAMPLE_GOOD_H
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#define RAGE_SOUND_READER_RESAMPLE_GOOD_H
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#include "RageSoundReader_Filter.h"
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class RageSoundResampler_Polyphase;
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/** @brief This class changes the sampling rate of a sound. */
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class RageSoundReader_Resample_Good: public RageSoundReader_Filter
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{
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public:
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/* We own source. */
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RageSoundReader_Resample_Good( RageSoundReader *pSource, int iSampleRate );
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RageSoundReader_Resample_Good( const RageSoundReader_Resample_Good &cpy );
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int SetPosition( int iFrame );
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int Read( float *pBuf, int iFrames );
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virtual ~RageSoundReader_Resample_Good();
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RageSoundReader_Resample_Good *Copy() const;
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bool SetProperty( const RString &sProperty, float fValue );
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int GetNextSourceFrame() const;
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float GetStreamToSourceRatio() const;
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/**
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* @brief Change the rate of a sound without changing the sample rate.
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* @param fRatio the ratio for changing. */
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void SetRate( float fRatio );
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/**
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* @brief Retrieve the exact rate.
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* @return the exact rate. */
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float GetRate() const;
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int GetSampleRate() const { return m_iSampleRate; }
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private:
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void Reset();
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void ReopenResampler();
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void GetFactors( int &iDownFactor, int &iUpFactor ) const;
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vector<RageSoundResampler_Polyphase *> m_apResamplers; /* one per channel */
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int m_iSampleRate;
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float m_fRate;
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};
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#endif
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/*
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* (c) 2006 Glenn Maynard
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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